WOOTON" AND STANDLEY FLORA OF NEW MEXICO. 201 



Suaeda moquini A. Nels. iu Coulter, New Man. Rocky Mount. 170. 1909. 



Type locality: Mountain on the west shore of the Salt Lake, Utah. 



Range: Wyoming and Colorado to California and New Mexico. 



New Mexico: Carrizo Mountains; Llano Estacado; Farmington; Alamogordo; 

 Wliite Sands; south of Roswell; Las Mitas. Alkaline soil, in the Lower and Upper 

 Sonoran Zones. 



4. ALLENROLFEA Kuntze. Burro weed. 



Succulent erect much-branched perennial, somewhat woody at the base; leaves 

 scalelike, broadly triangular; flowers in dense spikes, in threes in the axils of the 

 spirally ranked bracts. 

 1. AllenroKea occidentalis (S. Wats.) Kuntze, Rev. Gen. PI. 2: 546. 1891. 



Halostachys occidentalis S. Wats, in King, Geol. Expl. 40th Par. 5: 293. 1871. 



Spirostachys occidentalis S. Wats. Proc. Amer. Acad. 9: 125. 1874. 



Type locality: "About Great Salt Lake and in alkaline valleys westward to tlie 

 sinks of the Carson and Humboldt Rivers." 



Range: Utah and Nevada to Arizona and western Texas. 



New Mexico: Socorro; Mesilla Valley; WTiite Sands; above Tularosa; Roswell. 

 Alkaline soil, in the Lower Sonoran Zone. 



A very peculiar, almost leafless, shrubby halophyte. The young branches are 

 terete, of a pronounced green (though sometimes glaucous), and very succulent. It 

 grows to a height of about 150 cm. and is usually conspicuous for color alone among 

 the gray or brown plants with which it is commonly associated. It is sparingly eaten 

 by burros, hence the common name. 



5. EUROTIA Adans. Winter fat. 



A low, stellately tomentose shrub; leaves alternate, entire, linear to narrowly Linear- 

 lanceolate; flowers small, clustered, axillary and subspicate; calyx 4-parted; stamens 4. 



1. Eurotia lanata (Pursh) Moq. Chenop. 81. 1840. 



Diotis lanata Pm-sh, Fl. Amer. Sept. 602. 1814. 



Type locality: "On the banks of the Missouri, in open prairies." 



Range: New Mexico and Arizona, northward to Oregon and Manitoba. 



New Mexico: Common nearly throughout the State. Dry hills and plains, in tlie 

 Upper Sonoran Zone. 



The plant is highly prized by stockmen, particularly those who raise sheep, because 

 it furnishes a good feed when other kinds are scarce — hence the common name. 



o"- 



6. ATRIPLEX L. Salt bush. 



Monoecious or dioecious, mealy or scurfy annuals or perennials; staminate flowers 

 bractless, variously clustered; pistillate flowers subtended by 2 persistent bracts, 

 these becoming variously enlarged, thickened, and coalescent in fruit; leaves flat, 

 alternate or opposite. 



The genus contains several species which are of value as forage plants, most of them 

 being eaten more or less. One {A. expansa) is a common tumbleweed in the cultivated 

 lands in certain parts of the State. The plants occur mostly in open flats, preferring 

 rather compact soils, and all of them will tolerate considerable alkali in the soil. 



KEY TO THE SPECIES. 



Annuals. 



Leaves narrow, oblong to oblanceolate; plants mostly erect, 

 the branches not widely spreading. 

 Plants low, 40 cm. high or less; fruiting bracts com- 

 pletely united, orbicular, flattened, the margins 

 with numerous teeth; leaves small, 2 cm. long or 

 less 1 . A. elegans. 



